Prof. Debashis Gangopadhyay
Professor, Department of Physics and Director, School of Natural Sciences
Area of Research:
Quantum Field Theory, Cosmology, Quantum Computation and Information
Employment / Education / Miscellaneous :
Faculty (1st March 2020 onwards) : Dept.Of Physics, Sister Nivedita University, Kolkata
Faculty ( 2012- 2020): Ramakrishna Mission Vivekananda Educational and Research Institute, Belur Matth, Howrah
Faculty (1991- 2012): S. N. Bose National Centre for Basic Sciences, Kolkata, India
Postdoctoral Fellow (1989-1991): Bogolubov Laboratory of Theoretical Physics, Joint Institute of Nuclear Research, Dubna, Moscow, Russia
Postdoctoral Fellow (1987-1989): Institute of Physics, Bhubaneswar, India
Lecturer in Physics (1986-1987): Head, Department of Physics,College of Textile Technology,Berhampore, Murshidabad, India
Ph. D. (1988): Saha Institute of Nuclear Physics, Kolkata, India
M.Sc. (Physics,First Class)(1977): University of Calcutta, Kolkata, India
B.Sc. (Physics Hons.,First Class)(1975): Presidency College, University of Calcutta, Kolkata, India
Indian School Certificate (First Division) (1972), Calcutta Boys' School, University of Cambridge Local Examinations Syndicate
National Scholarship (1972)
National Science Talent Search Scholarship (1972 – 1977)
Selected Publications :
- Three Flavoured neutrino oscillations and the Leggett Garg Inequality, Debashis Gangopadhyay and Animesh Sinha Roy, Euro.Phys. Jour. C 77, 260 (2017)
- Semiclassical treatment of k-essence effect on cosmic temperature, Abhijit Bandyopadhyay, Debashis Gangopadhyay and Arka Moulik, Gravitation and Cosmology 23, 184 (2017)
- The Leggett-Garg Inequality and Page-Wootters Mechanism, Debashis Gangopadhyay and Animesh Sinha Roy, Euro. Phys. Lett. 116, 40007 (2016)
- The Hawking temperature in the context of dark energy for Reissner-Nordstrom and Kerr background, G. Manna and Debashis Gangopadhyay, Euro. Phys. Jour. C 74, 2811 (2014)
- Probing the Leggett-Garg Inequality for Oscillating Neutral Kaons and Neutrinos, D. Gangopadhyay, D.Home, A.Sinha Roy Phys.Rev. A88 022115 (2013)
- The k-essence scalar field in the context of Supernova Ia Observations, Abhijit Bandyopadhyay, Debashis Gangopadhyay and Arka Moulik, Eur. Phys. J. C 72, 1943, (2012)
- Estimating temperature fluctuations in the early Universe, Debashis Gangopadhyay, Gravitation and Cosmology 16, 231 (2010)
- Logarithm of the scale factor as a generalised coordinate in a lagrangian for dark matter and dark energy, Debashis Gangopadhyay and Somnath Mukherjee, Physics Letters B 665, 121 (2008)
- The CNOT quantum logic gate using q-deformed oscillators, Debashis Gangopadhyay, Int. Jour. Quant. Inform. 6, 471 (2008)
- Spacetime dependent Lagrangians and weak-strong duality: Sine-Gordon and massive Thirring models, R. Bhattacharyya and Debashis Gangopadhyay, Mod. Phys. Lett. A 17, 729 (2002)
- Duality invariance of cosmological solutions with torsion, Debashis Gangopadhyay and S. Sengupta, Int. Jour. Mod. Phys. A 14, 4953 (1999)
- On canonical q-transformations with two q-oscillators, Debashis Gangopadhyay, Mod. Phys. Lett. A 31, 2909 (1991)
- Gauge fixing for linearized gravity and antisymmetric tensor fields, Debashis Gangopadhyay, Int. Jour. Mod. Phys. A 5, 2145 (1990)
- Fujikawa-type formulation of gauged BRST symmetry for the free Bosonic string, Debashis Gangopadhyay and L. P. Singh, Phys. Rev. D (Rapid Comm.) 38, 2652 (1988)
Research Interests :
I have worked in the formalism and applications of quantum field theory. In cosmology I am mostly interested in using field theoretic techniques to understand the early universe and the dark matter and and dark energy scenario. In quantum computation and information theory, my interest lies in quantum logic gates and quantum correlations.
(1) Rajsekhar Bhattacharyya (Ph. D. Jadavpur University), Thesis title: “Studies on recent development in non-perturbative aspects of gauge theories” ( Quantum field Theory)
(2) Goutam Manna (Ph. D. Calcutta University), Thesis title: “Some studies in emergent gravity and k-essence ” (Cosmology and Quantum field Theory)
(3) Somnath Mukherjee (Ph. D. Jadavpur University), Thesis title: “Some studies on cosmic origins of dark matter and dark energy” (Cosmology)
(4) Oindrila Ganguly (Ph. D. Calcutta University), Thesis title: “Lorentz invariance violation: a study in the context of effective theories” (Quantum Field Theory)
(5) Animesh Singha Roy (Ph. D. RKMVERI), Thesis title: “Neutral Kaon Oscillations, Neutrino Oscillations and the Page-Wootters Mechanism in the light of the Leggett-Garg Inequality” (Quantum Correlations)
Current PhD students :
Visiting Summer Internships :
Mr. Praneet Pathak , IIESER, Mohali, May-July 2019 (Indian Academy of Sciences Summer Fellow)
Mr. Mritunjay Tyagi, Delhi University, June- August 2019 (Indian Academy of Sciences Summer Fellow)
Ms. Ashwini Nagaraj Shenoy (II BE) N.M.A.M. Institute of Technology, Udupi, May-July 2020 (Indian Academy of Sciences Summer Fellow)
Mr. Gaurang Ramakant Kane (II BTech) Indian Institute of Technology, Guwahati, June-August 2020 (Indian Academy of Sciences Summer Fellow)
Prof. Dr. Partha Sarathi Joarder
Associate Professor, Department of Physics, SNU
Qualification: Ph.D (The University of St. Andrews, Scotland, UK) in Solar Magnetohydrodyanamics (MHD) (1992)
Experience in Educational Field:
Worked in the Department of Physics, Bose Institute, Kolkata as Associate Prof. till December, 2018.Assoc. Professor at the Department of Physics, Sister Nivedita University from January, 2019 to present.
Area of Research:
Solar-Terrestrial (ST) Physics, Space Plasma Physics, High Energy Astrophysics
1) Multiwavelength analysis of low surface brightness galaxies to studyprobable dark matter signature: P. Bhattacharjee, P. Majumdar, M. Das, S. Das, P.S. Joarder and S. Biswas, Under the process of Revision at the Monthly Notices of Royal Astronomical Society(MNRAS) (2020).
2) Analysis of Fermi-LAT data from Tucana-II: Possible constraints on Dark Matter Models with an intriguing hint of a signal: P. Bhattacharjee, P. Majumdar, S. Biswas and P.S. Joarder, Journal of Cosmology and Astroparticle Physics(JCAP),08 (2019), 028.
3) Constraints on Dark Matter Models from the observation of Triangulum-II with the Fermi Large Area Telescope: S. Biswas, P. Bhattacharjee, P. Majumdar, S. Das, M. Das and P.S. Joarder, JCAP, 11 (2017), 003.
4) Spherical accretionin Giant Elliptical Galaxies: multi transonicity,shocks,and implicationson AGN feed- back: S. Raychaudhuri, S. Ghosh and P.S. Joarder, MNRAS,479 (2018),3011.
5) Multifragmentation model for the production of astrophysical strangelets: S. Biswas, J.N. De, P.S. Joarder, S. Raha and D. Syam, Phys. Rev. C95,(2015) 045201.
6) Multifragmentation model of astrophysical strangelets:S.Biswas,J.N.De,P.S.Joarder,S.RahaandD.Syam, Phys. Letts. B, 715 (2012) 30.
7) Influenceof microscopic particle interaction models on the flux of atmospheric antiprotons: A.Bhadra,B.Bijay,S.K.Ghosh,P.S.JoarderandS.Raha, AstroparticlePhysics, 35 (2012) 277.
ST Physics, MHD, Hydrodynamic and Cosmic Ray Monte-Carlo Simulation at High Altitude, Analysis of High Energy Gamma Rays. My recent research interest also includes Foundation of Quantum Mechanics, Logic and Philosophy of Science, although I do not yet have any publications in these three areas.
PhD students: Joint-Supervisor of Dr. Sayan Biswas (Calcutta University)
Current PhD students:
1. Ms. Sananda Raychaudhuri 2. Ms. Pooja Bhattacharjee 3. Mr. Kaushik Naskar
All registered in University of Calcutta
Dr. Shrabana Chakrabarti (Sarkar)
Assistant Professor of Physics, Department of Physics, TEACHER IN CHARGE, DIPLOMA ENGINEERING
Area of Specialization:
a. Primary: Atomic, Molecular, Quantum and Nonlinear Optics
b. Secondary: Coherent spectroscopy, fast and slow light, atom cooling and trapping
Highest Academic/Professional Qualification:
PhD in experimental physics (2009) from the University of Calcutta
First prize in the “Colloquium for Young Physicists” organized by the Indian Physical Society at Saha Institute of Nuclear Physics (August 24-25, 2006), Kolkata
Best poster award in DAE-BRNS National Laser Symposium (NLS-4, January 2005), BARC, Mumbai for the poster “Observation of Electromagnetically Induced Transparency in Rubidium D2 Transitions”.
Principal Investigator in the DST funded project “Freezing Light in Cold Atoms” at Saha Institute of Nuclear Physics, Kolkata
Experience Research Organization:
Research Associate (2008) – Quantum Optics Group
Tyndall National Institute, Cork, Ireland
Postdoctoral Fellow (2008-2010) – Quantum and Nonlinear Optics Group
Technical University Darmstadt, Germany
Postdoctoral Fellow (2011-2013) – Quantum Optics Group
Technical University Kaiserslautern,
DST Women Scientist (WOS-A) – Applied Nuclear Physics Division
(2014 - 2018) Saha Institute of Nuclear Physics, Kolkata
Research and Publications:
List of Publications (In Peer Reviewed Journals)
1. Pulse delay and group velocity dispersion measurement in V-type electromagnetically induced transparency of hot atom, Bankim Chandra Das, Dipankar Bhattacharyya, Arpita Das, Satyajit Saha, Shrabana Chakrabarti and Sankar De
2. Observation and theoretical simulation of dispersive properties of an electromagnetically induced transparent 87Rb atomic medium, Arpita Das, Bankim Chandra Das, Shrabana Chakrabarti, Dipankar Bhattacharyya2 and Sankar De
3. Manipulating cold atoms with optical fibres, Shrabana Chakrabarti, Current Science 112, 1369 (2017)
4. Simultaneous observations of Electromagnetically Induced Transparency (EIT) and Absorption (EIA) in a multi-level V-type system of 87Rb and theoretical simulation of the observed spectra using a multi-mode approach, Bankim Das, Dipankar Bhattacharyya, Arpita Das, Shrabana Chakrabarti, and Sankar De, Journal of Chemical Physics 145, 224312 (2016)
5. Adiabatically driven frequency conversion towards short extreme-ultraviolet radiation pulses , Shrabana Chakrabarti, Holger Muench and Thomas Halfmann, Phys. Rev. A 82, 063817 (2010)
6. Coherent Control of Frequency Conversion towards Short (Picosecond) Vacuum-Ultraviolet Radiation Pulses, H. Münch, S. Chakrabarti, and T. Halfmann, Phys. Rev. A 82, 033821 (2010)
7. Tapered optical fibers as tools for probing magneto-optical trap characteristics, Michael J. Morrissey, Kieran Deasy, Yuqiang Wu, Shrabana Chakrabarti, and Síle Nic Chormaic, Rev. Sci. Inst. 80, 053102-1 (2009).
8. Study of width and height of EIT resonance in a Doppler broadened five-level system with varying probe power, M.M. Hossain, S. Mitra, S. Chakrabarti, D. Bhattacharyya, B. Ray, and P.N. Ghosh, Eur. Phys. J. D 53, 141 (2009).
9. Velocity dependent pump-probe spectroscopy for a five-level system: An application to Rb D2 transitions, Dipankar Bhattacharyya, Amitava Bandyopadhyay, Shrabana Chakrabarti, Biswajit Ray and Pradip N. Ghosh, Chem. Phys. Lett. 440, 24 (2007).
10. Laser frequency stabilization for atom cooling and magnetic field compression of the trap, S. Chakrabarti, A. Ray, A. Bandyopadhyay, D. Bhattacharyya, B. Ray, B. N. Jagatap, K. G. Manohar and P. N. Ghosh, Laser Physics 17, 1 (2007).
11. Velocity selective optical pumping and repumping effects with counter and co propagating laser radiations for D2 lines of rubidium, S. Chakrabarti, B. Ray and P. N. Ghosh, Eur. Phys. J. D 42, 359 (2007).
12. Laser cooling, magneto optic trapping and spectroscopy of Rubidium atoms, Shrabana Chakrabarti, Biswajit Ray and Pradip N. Ghosh, Physics Teacher, 48, 81 (2006).
13. Velocity selective resonances and electromagnetically induced transparency in atomic Rubidium, Shrabana Chakrabarti, Amitkiran Pradhan, Amitava Bandyopadhyay, Ayan Ray, Biswajit Ray, Dipankar Bhattacharya and Pradip N. Ghosh, Indian Journal of Physics 80, 487 (2006).
14. Velocity selective optical pumping effects and electromagnetically induced transparency for D2 transitions in Rubidium, Shrabana Chakrabarti, Amitkiran Pradhan, Biswajit Ray and Pradip N. Ghosh, J. Phys. B: At. Mol. Opt. Phys. 38, 4321 (2005).
15. Velocity-selective resonance dips in the probe absorption spectra of Rb D2 transitions induced by a pump laser, S. Chakrabarti, A. Pradhan, A. Bandyopadhyay, A. Ray, B. Ray, N. Kar and P. N. Ghosh, Chem. Phys. Lett. 399, 120 (2004).
In Conference Proceedings
16. Laser cooling, magneto optic trapping and spectroscopy of Rubidium atoms, Shrabana Chakrabarti, Biswajit Ray and Pradip N. Ghosh, Physics Teacher, 48, pg.81 -86 (2006) 15. Velocity selective resonances and electromagnetically induced transparency in atomic Rubidium, Shrabana Chakrabarti, Amitkiran Pradhan, Amitava Bandyopadhyay, Ayan Ray, Biswajit Ray, Dipankar Bhattacharya and Pradip N. Ghosh, Indian Journal of Physics 80 (5), pg. 487-489 (May 2006).
17. Characterization of a cloud of cold Rubidium atoms – Shrabana Chakrabarti, Amitava Bandyopadhyay, Biswajit Ray and Pradip N. Ghosh, National conference on Atomic and Molecular Physics, Jan 11 – 13, 2007, Tata Institute of Fundamental Research, Mumbai, India
18. Setting up a Magneto Optical Trap to cool Rubidium atoms and characterization of the cloud of cold Rubidium atoms – Shrabana Chakrabarti, Amitava Bandyopadhyay, Dipankar Bhattacharyya, Biswajit Ray and Pradip N. Ghosh, International Conference on Lasers and Nanomaterials, Nov 30 – Dec 2, 2006, Saha Institute of Nuclear Physics, Kolkata, India.
19. High Resolution Laser Spectroscopy and Laser Cooling of Rubidium Vapour – Shrabana Chakrabarti, Indo-French Centre for the Promotion of Advanced Research (IFCPAR) Workshop for young Scientists on Laser Physics and Quatum Optics, January 4-8, 2006, Raman Research Institute, Bangalore, India.
20. Construction of a magneto optical trap (MOT) for confining cold Rubidium atoms – Shrabana Chakrabarti, Ayan Ray, Amitava Bandhyopadhyay, Biswajit Ray, B. N. Jagatap, K. G. Manohar and Pradip N. Ghosh, International Conference on Optics and Optoelectronics, 12 – 15 Dec, 2005, IRDE, Dehradun, India.
21. Observation of electromagnetically induced transparency in Rubidium D2 transitions – Shrabana Chakrabarti, Amitkiran Pradhan, Biswajit Ray and Pradip N. Ghosh, DAE-BRNS National Laser Symposium (NLS-2005) Pg. 634, BARC, Mumbai, India.
22. Veocity selective resonance dips in co propagating pump probe spectroscopy of Rb D2 transitions – Shrabana Chakrabarti, Amitkiran Pradhan, Amitava Bandyopadhyay, Ayan Ray, Biswajit Ray, Nikhilesh Kar and Pradip N. Ghosh DAE-BRNS National Laser Symposium (NLS-2005) Pg. 381, BARC, Mumbai, India.
23. Saturated absorption spectroscopy using co proppagating beams – Shrabana Chakrabarti, Amitkiran Pradhan, Amitava Bandyopadhyay, Ayan Ray, Biswajit Ray and Pradip N. Ghosh, National Symposium on Atomic, Molecular structure, Interactions and Laser Spectroscopy NSAMILS, March 14 -15, 2004, Pg.4, BHU, Varanasi, India.
Current Research Interest:
1. Coherent spectroscopy in room temperature atomic vapour cells : electromagnetically induced transparency and its applications
2. Electromagnetically induced transparency and realization of slow light in cold atoms in a magneto optical trap
3. Coupling cold atoms inside hollow core photonic crystal fiber
Prof. Dr Arpita Chattopadhyay
Assistant Professor, Department of Physics, SNU
Ph.D (Theoretical Physics), M.Sc (Physics)
Ph.D research : Theoretical Quantum Physics (5 years, Indian Association for the Cultivation of Science)
Post Doctoral research : Laser Physics (3 years, Photon Science Institute, The University of Manchester)
Collaborative research activities and funded projects : Applied Nanoscience and Environmental Physics
Ongoing research project :
Development and optimization of the SPR based biosensors to monitor environmental hazards. The outcome is intended to help the environmentalists and lay people alike to use the cost effective technology towards achieving a cleaner and greener Bengal.
Teaching Experience :
Degree College under University of Burdwan : 1 year
University of Manchester : 1 year
Engineering College : 5 years
Sister Nivedita University : 2 years
Selected Publications in Peer Reviewed Journals:
1. Laser assisted excitation in electron hydrogen-like ion collisions, A. Chattopadhyay and C Sinha, J. Phys. B: At. Mol. Opt. Phys. 37, 3283 (2004).
2. Ionization of a hydrogenic ion by electron and positron impact in the presence of a laser field, A. Chattopadhyay and C. Sinha, Phys. Rev. A 72, 053406 (2005).
3. Laser assisted single ionization of a hydrogenic ion by electron impact, C. Sinha and A. Chattopadhyay, Journal of Plasma and Fusion Research, Series 7, 256 (2006).
4. Laser assisted excitation (to n = 2 level) of a hydrogenic ion inside a plasma medium, A Chattopadhyay and C. Sinha, Journal of Plasma and Fusion Research, Series 7, 286 (2006).
5. Laser assisted antihydrogen formation, A. Chattopadhyay and C. Sinha, Phys. Rev. A 74, 022501 (2006).
6. The effect of coherent phase control in (e, 2e) process of a hydrogenic ion in presence of a two colour laser field, C. Sinha, A. Chattopadhyay and S. Ghosh Deb, Journal of Physics: Conference Series 194, 112003 (2009).
7. Ionization of a lithium ion by electron impact in a strong laser field, S. Ghosh Deb, A. Chattopadhyay and C. Sinha, Phys. Rev. A 84, 063404 (2011).